Beat-up for axminster loom



May 3l, 1955 F. B. scHoFlELD ErAL BEAT-UP FOR AXMINSTER Loom 6Sheets-Sheet l Filed Jan. 28. 1953 May 3l, 1955 F. B. scHoFlr-:LD ETALBEAT-UP FOR AmINsTER LooM 6 Sheets-Sheet 2 Filed Jan. 28, 1953 May 31,1955 F. B. scHoFu-:LD ETAL I 2,709,457

BEAT-UP FOR AmINsTER Loom Filed Jan. 2a, 1955 e sheeis-sheet 3 M3331,1955 F. B. ls-::lloF|El D Erm. 2,709,457

BEAT-UP FOR AXMINSTER LooM Filed Jan. 28, 1953 6 Sheets-Sheet 4 May 31,1955 F. B. scHoFlELD UAL 2,709,457

l BEAT-UP FOR AmlNsTER LooM Filed aan. 28. 1953 6 Sheets-Sheet 5 May 3l,1955 F. B. scHoFlELD Erm. 2,709,457

BEAT-UP FOR AXMINSTER LOOM Filed Jan. 28, 1953 6 Sheets-Sheet 6 UnitedStates Patent O 2,709,457 BEAT-UP FOR AXMINSTER LOOM Fred BrownSchofield, Royton, and Arthur Sutcliffe, Oldham, England, assignors toT. M. M. (Research) Limited, Rossendale, England Application January 28,1953, Serial No. 333,748

Claims priority, application Great Britain January 30, 1952 t 6 Claims.(Cl. 139-21) This invention relates to the beating-up of the weft inlooms for weaving pile fabrics, such for example as spool Axminstercarpet looms, of the type in which the whole of the wefts required forbinding a row of tufts are inserted simultaneously by one insertion andwithdrawal of needles or the equivalent, and are then divided into twogroups, one of which is beaten up before the tufts are inserted and theother of which is beaten up after the tufts have been inserted.

In a known loom of this type, the first group of wefts is beaten up byan auxiliary beat-up reed which is raised through the warp yarns formingthe shed, then moved to perform the beat-up operation and afterwardslowered clear of the shed and a main beat-up reed thereafter movesforward to beat up the second group of wefts. This type of beat-upmotion has the disadvantages that the necessarily large number of movingparts leads to a.

congestion of mechanism under the front of the loom, making theadjustment of the various motions a difficult task, and that it isimpossible to exert a strong beat-up action on the first group of weftsas required for the production of high grade fabrics with a large numberof tufts per inch.

The object of the present invention is to simplify the beat-upmechanism, to ensure a strong beat-up for all groups of weft threads,and to facilitate access to, and adjustment of, the beat-up motion.

In a loom of said type, according to the present invention, all of thebeat-up operations associated with each insertion of weft are performedby a single beat-up reed, means being provided for displacing one groupof wefts clear of the beat-up reed during its first beat-up operationand thereafter restoring them into the path of said reed so that theywill be beaten-up at a second beat-up operation of the reed.

One form of loom in accordance with the invention is hereinafterdescribed in detail by way of example, with reference to theaccompanying diagrammatic drawings. In said drawings, Fig. 1 is a partlysectional side elevation of the lower part of the loom, Fig. 2 is apartly sectional front view thereof, Figs. 3 and 4 are detail viewsillustrating the weft-lifting mechanism in the positions occupiedrespectively before and after the first beat-up operation, Fig. 5 is adetail view illustrating the means employed to actuate the weft-liftingmember, Fig. 6 is a fragmentary view in elevation of the selvedgemechanism and the dividing-finger operating mechanism, and Figs. 7 to 11are diagrams showing the respective stages which compose a working cycleof the loom.

The loom illustrated in the drawings is of more or less conventionaltype, a double shot of weft being inserted by the needles at a singleoperation and both wefts being bound at the selvedge by a twin shuttleselvedge mechanism operated once during each working cycle consisting ofthe successive steps of inserting upper and lower wefts y at a singleoperation, binding the selvedge, dividing the upper wefts, beating-uppart of the upper weft and the lower weft, inserting and severing thepile tufts, beatingup the remaining part of the upper weft and changingthe shed preparatory to the next cycle.

It will be seen from Fig. l that the loom comprises a frame Ztl,supporting the moving parts of the mechanism hereinafter described, andincorporating means (not shown) for the suspension of the healds 21, 22,a fixed reed 23 and a cloth-plate 24. The upper and lower chain warps,and the horizontal stuffer warps which compose the double shed areindicated at A, B and C, respectively. Two weft-carrying needles 25 and26 are actuated simultaneously by means (not shown) to insert weftthreads respectively into the bottom shed BCl and the upper shed AC. Thelower needle 25 carries a single weft thread D which is looped to formtwo strands extending through the lower shed and the upper needle 26carries two threads E which are looped to form four strands extendingthrough the upper shed.

A twin-shuttle selvedge cord mechanism, shown in Fig. 6, is employed toengage and retain in known manner, the upper and lower weft loops at theside of the loom remote from the weft-inserting needles 25, 26. Suchmechanism incorporates a shuttle-carrier 27 which is mounted foroscillatory movement upon a bracket 28, said carrier 27 being coupled bya link 29 to an arm 30 which bears a cam-follower 31 and which isactuated after each insertion of weft by the action of a cam 32 fixed onthe continuously revolving shaft 33. A tension spring 34 anchoring thearm 30 to the frame 20, maintains the cam-follower 3l in contact withthe cam 32.

At this stage the warp and weft threads occupy the positions shown inFig. 7. Before the withdrawal of the needles 25, 26, a dividing finger35 (Fig. 6) is actuated to divide the weft E inserted by the needle 26so that the part E1 thereof is depressed so as to be groupedwith thelower weft D and the remainder E2 raised to an elevated position for thepurpose hereinafter described. Said finger 35 is carried by a slidablehorizontal bar 36 which is operated at the appropriate instant by adouble armed lever 37, 38, the part 37 of which engages between vtwoabutments 39, 40 on said bar 36, whilst the other part 38 carries a camfollower 41 which cooperates with a cam 42 mounted on the constantlyrotating shaft 43. Said lever 37, 38 is fulcrumed at 44 upon a fixedbracket 45. After the operation of dividing the wefts has beenperformed, the needles 25, 26 are withdrawn to the position shown inFig. 3.

In order to complete the grouping of the wefts, initiated by thedividing finger 35, the upper threads E2 at the needle insertion side ofthe loom are now raised to a high position in the upper shed throughouttheir length as shown, by the lifting finger 46 which is mounted forvertical sliding movement in the frame 20. Whilst the motion of saidfinger 46 may be performed mechanically,

it is preferably operated by the solenoid 47 (Fig. 5)

which is energised by a switch 4S in the circuit of which the leads areindicated at 49, said switch 48 being controlled intermittently by a camSti mounted on the shaft 43. A spring 51 which, when the finger 46 israised, is compressed between a collar 52 on said finger and a fixedpart of the frame 20, is effective to return the finger 46 to thelowered or inoperative position (shown in Fig. 4) when the switch 48 isbroken.

The beat-up reed 53, the dents of which are open at their upper ends, iscarried by arms 54 which are pivotally mounted on a shaft 55 locatedbeneath the fell of the cloth. Also fixed to said shaft 5S is an arm 56which is coupled by an adjustable link 57 to a lever 58 which is pivotedon the frame at 59. Said lever 58 bears a camfollower 60 which operatesin the track 61 of a cam 62, which latter is fixed to a wheel 63 mountedon the constantly rotating shaft 33. In order that the angular positionof the cam 62 on the wheel 63 may be adjusted to Patented May 31, i955vary the timing of the beat-up operations, the cam is xed to the wheelby means of setscrews 64 which are received in circumferential slots 65in the wheel.

After the lifting nger 46 has been raised to lift the strands E2, thebeat-up reed 53 is rocked on the shaft S5 so as to beat up all the weftstrands lying in its path of movement, i. e. the lower group comprisingthe strands D in the bottom shed and the two strands El in the top shedwhich have not been raised by the dividing 'linger 35 and the liftingnger 46. The strands E? which have been raised by said iingers 35 and d5are above this path of movement, and are not beaten up during the saidfirst movement of the reed 53 (Fig. 8). As said reed 53 returns to itsbackward position, the tuft yarns F are inserted in the usual manner(Fig. 9), the lifting finger 46 is lowered and the dividing iinger 3S iswithdrawn to lower the two weft strands E2 into the path of the reed S3,so that on the next forward movement of the latter (Fig. l0), saidstrands E2 are beaten up to the fell of the cloth behind the tuft yarnsF. The tuft yarns F are turned up by the member 66 and severed by theknife 6." in known manner, and after reversal of the shed (Fig. ll) thecycle of operations is repeated.

Since the top of the beat-up reed 53 lies below the top shed line duringat least some part of the path of its movement, the Xed guide reed 23serves to maintain the correct spacing of the warp threads irrespectiveof their positions in the shed.

If desired, the apparatus may include placer fingers 68, which are movedforward at opopsite sides of the shed during the tirst beat-up operationand which then remain at the fell of the cloth to hold the lower group Dand E1 of weft in position when the reed 53 falls back, before executingthe second beat-up operative after the weft E2 has been lowered. Saidplacer fingers 63 are carried by arms 69 pivoted at '7G and actuated bylevers 71 which bear earn-followers 72 in operative relationship withcams 73 on the shaft 43.

What we claim as our invention and desire to secure by Letters Patentis:

l. A loom of the type referred to, comprising a single beat-up reed forperforming all of the beat-up operations associated with each insertionof weft, and means for displacing one group of wefts clear of saidbeat-up reed Cil during its rst beat-up operation and thereafterrestoring them into the path of said reed so that they will be beaten upat a second beat-up operation of said reed.

2. A loorn of the type referred to, comprising a xed reed to maintainspacing of the warps, a single beat-up reed, means for dividing thewefts into two distinct groups of which only one lies in the path of thebeat-up reed, means for actuating said beat-up reed to execute a firstbeating-up operation before insertion of the tufts, means for retractingsaid beat-up reed, means for restoring the divided wefts not beaten upat said first operation into the path of said beat-up reed, and meansfor actuating the beat-up reed to execute a second beating-up operationafter insertion of the tufts.

3. A loom according to claim 2 comprising, in conjunction with selvedgemechanism at the side of the loom remote from the weft-insertion side,means for dividing the weft into two groups, of which one includes weftinserted in the bottom shed and other weft inserted in the upper shed,and of which the other group is composed of weft inserted in the uppershed, and means for lifting said second weft group at the weft-insertionside out of the path of the beat-up reed prior to the irst beating-upoperation and for lowering said second weft group after the iirstbeating-up operation.

4. A loom as claimed in claim 2, comprising means for retaining the weftgroup beaten-up at the rst beat-up operation during the insertion of thetufts and until the second beat-up operation of the second weft group.

5. A loom as claimed in claim 3 comprising, in conjunction with meansfor dividing the weft into two groups at the side of the loom remotefrom the weft-insertion side, a lifting finger mounted for verticalslidable movement and located so that when raised it will lift the weftof the upper group out of the path of the beat-up reed.

6. A loorn as claimed in claim 5, comprising electromagnetic meansenergised at each working cycle to raise the lifting finger and tomaintain the same raised during the first beat-up operation.

Head Feb. 2l, 1899 Southwell et al Aug. l5, 1899

